Paper machinery



Aug. 7, 1934. H. L. KUTTER PAPER MACHINERY Filed April 19, 1935 PatentedAug. 7, 1934 UNITED STAT 1,969,140 PAPER, MACHINERY Herman L. Kuttr,Hamilton Ohio assig iiorpto The Black-Clawson Co a corporation'of Ohiomp ny, Hamilton, o,

Application April 19,1933, Serial No. 666,876 6 Claims. (01. 92-49) Thisinvention relates to paper machinery and more particularly to papermachinery employing upper and lower rolls arranged for pressure actionon an endless web passing through the nip of the T0115.

One object of the invention is the provision of a simple and effectivemeans for raising the upper rollof an apparatus of the charactermentioned out of engagement with the lower roll, the con- 0 structionemploying an adjustable connection between a plurality of raisingelements one of which is operated by the direct action of a cam or thelike. I

Another object of the invention is the provision of a raising means forthe upper roll of a cylinder mold apparatus, employing a plurality ofadjustably interconnected levers one of which movably carries a bearingblock for the upper roll, the construction providing for adjustment ofthe bearing block while maintaining the force receiving end of therolllifting device at some normal predetermined position.

Further objects and advantages of the invention will be apparent fromthe following description, the appended claims, and the accompanyingdrawing, in which- Fig. 1 is a side elevation of a cylinder moldapparatus having a roll lift embodying the present invention; 1

Fig. 2 is a side elevation on a smaller scale showing the roll liftapplied to the primary suction rolls of a paper making machine;

Fig. 3 is a top plan view of a portion of the device shown in Fig. 1.

Fig. 4 is a detail view of the bearing carrying lever;

Fig. 5 is an end view of the same; and Fig. 6 is an end view of thelever operating arm. Referring more particularly to the drawing byreference numerals, 10 designates generally the vat, and 11 and 12respectively designate the lower or cylinder mold roll and the upper orcouch roll of a paper making machine. In a device of .this sort the toproll is usuallya rubber covered roll which presses with considerableforce against the cylinder mold by reason of its own weightandadditional gravity means such as the weight 13, weight applying arm 14,and. link 15. In accordance with the present invention. duringshutdownperiods and also at times when itis necessary to remove and replace afelt which operates through the nip of the rolls the upper or couch roll12 may be quickly and easily lifted ofi from the cylinder mold so thatthe rubber covering will be relieved of all weight that would otherwisebe applied in one position for a considerable length "of time. Thislifting device as will be more fully set forth in detail, is of suchcharacter that the axis of the upper roll may assume various operatingpositions with respect to the lower roll axis, the-position of theupperroll axis changing, for. example, as the point of contact ortangencybf the two rolls is moved up ordown, or- .wheno'ne of the rollsis replaced by another roll rnachena of the roll .12 is journalled in abearing block 16, each of which is adjustably supported by a pivotedsupporting lever 1'7 having a fulcrumaxis 18'on a fixed standard 19adjacent'the roll. The upper portion of each i'" bearing. block is madein the 'form of a shoe which is, adaptedto slide in. a track 28 formedby flanges 20" projecting inwardly from the opposite side'sof, the leveras shown in Fig; 5. Suitable holding screws 21 lock the shoe in anydesiredposition of adjustment on the lever 17. As'shown in Fig; 1, thepoint of engagement of thetwo rolls is indicated at 22. However, if itis desired-that the point of contact be changed, or brought. to thepoint 23 for example, the bearing block may be moved outwardly or totheright as shown in Fig. 1, which will have the effect of lowering theaxis of the roll 12 and of course'jwill also have the further effect oftiltingthelever 17.

' The fulcrum 'end of the lever 17 is bifurcated I as shown in Fig. 4,the two end legs 24 being .rotatably supported on a carrying pin whichalso preferably forms the fulcrum point of the operating arm or lever25. This arm 25 extends generally transversely with respect to the lever17 in theembodiment of the invention herein illustrated. The arm 25 hasa projectinglug 26 provided at a suitable distance from the fulcrumpoin'tjof the parts 1'7 and 25. An adjusting screw or stop is adjustablyprovided in one of these parts, and bears against the other part sotha't as the arm 25, for example,,is moved counterclockwise from itsnormalposition shown in Fig. 1, the.arm 17 will be cor're'spondingly'moved in order that the weight of the roll 12 maybe relievedfrom thelower roll. As herein shown the adjustable connection betweenthe two parts 17 and 25 comprises abolt 25 counterclockwise when it isdesired that the roll 12 be raised. The operating means preferablycomprises a cam 29 secured to the rotatable shaft 30, the shaft having along handle 31 or other suitable operating means which permits it to berotated manually. One portion of the cam 29 is fiat as indicated at 32and when this fiat portion is brought into engagement with the straightportion 33 of the arm 25, the latter will be held in raised positionwithout other locking means being required.

It will now be understood that regardless of the position of the bearingblock or shoe .on the lever 17, the adjusting screw 2'7 may be so setthat the arm 25 assumes its normal position, as shown in Fig. 1, withtheend of the screw 27 bearing against the lug on the arm. In this normalposition the lower end of the arm is adapted to be movedcounterclockwise as soon as the cam 29 is rotated so that the upper rollcan be quickly and conveniently moved up away from the lower roll. Thissaves the rubber orv other surface of the roll and prevents it frombeing corrugated or damaged during shut-down periods.

It should also be understood that the invention as herein set forth isnot limited to a cylindermold type of apparatus, as the upper roll ofraised in the same manner.

rimary suction rolls, for example, may be centric cam operated on a partthat was immovably fixed with respect to the lever 17. However, with theadjustable interconnection between levers 25 and 17 the full throw ofthe lifting means may be obtained and this lifting means may be made avery simple device which is effective not only for intentionaladjustments of position of the upper roll bearing block, but

is also effective when the couch roll is replaced by another of largeror smaller diameter, or when the rubber wears down considerably, eitherof which have the effect of raising or lowering the center of the toproll.

While the form of apparatus herein described constitutes a preferredembodiment of the invention, it is to be understood that the inventionis not limited to this precise form of .appara-tus, and that changes maybe made therein without departing from the scope of the invention whichis defined in the appended claims.

What is claimed is:

1. In paper making apparatus of the character described, cooperatingupper and lower rolls, a bearing block for said upper roll, a pivotallymounted lever on'which said bearing block is said lower roll.

, 2. In paper making apparatus of the character described, cooperatingupper and lower rolls, a I

bearing block for saidupper roll, a pivotally mounted lever on whichsaid bearingblock is ad'- I,

Fig. 2 shows the same construction of quick-lift apparatus as apjustablymounted, a second pivotally supported lever, a screw adjustably threadedin one of said levers and forming an abutment for the other of saidlevers so as to provide an adjustable connection between said levers tomaintain a predetermined normal position of said second lever when thebearing block is adjusted to different positions on said firstlever, anda rotatable member having an eccentric-surface engageable with saidsecond-lever for moving the same from its predetermined normal positionto raise said upper roll away from said lower roll.

3. In-paper making apparatus of the character described, oooperatingupper and lower rolls, a bearing block for said upper roll, a pivotallymounted lever on which said bearing block is adjustably mounted, asecond lever, said levers having a common fulcrum axis, an adjustablestop on one of said levers adapted for engagement with the other of saidlevers at a distance from the fulcrum axis to maintain a predeterminednormal position of said second lever when said bearing block is adjustedto different positions on said first lever, and'a rotatable thrust meansfor moving said'second lever from its predetermined normal position toraisesaid upper roll way from said lower roll. I

4. In paper making apparatus or" the character described, cooperatingupper and lower rolls, a

bearing; block for said upper roll, a pivotally mounted lever on whichsaid bearing block is adjustably mounted, a second levensaid levershaving a common fulcrum axis and extendinggenerally transversely withrespect to one another,

and an adjustable screw carried by one of said levers and adapted forengagement with the other of said levers at a distance from the fulcrumaxis to maintain a predetermined normal position of said second leverwhen said bearing block is adjusted to difierent positions on said firstlever,

and a rotatable thrust. means for moving said second lever from itspredetermined normal position to raise said upper roll away from saidlower 1011. V V

5. In a cylindenmold: machine for making paa) per, a cylinder mold rollanda couch roll cooperating therewith, abearing block for said couchroll, a pivotally mounted lever on which said bearing block is mounted,a second pivotally mounted lever, an adjustable stop between said leversproviding an adjustable connection for maintaining a predeterminednormal position of said second lever for-various positions of said firstlever, and rotatable thrust means for moving said second lever itspredetermined normal position to raise the couch roll away from saidcylinder mold roll.

, 6, In paper making apparatus of the character described, cooperatingupper and lower rolls, a bearing block for. said upper roll, a pivotallymounted lever on which said bearing block is adjustably mounteda leveroperating arm, .an adjustable connection between said lever andarm formaintaininga predetermined normal position of said arm' when the bearingblock is adjusted to. different positions on'said lever, and moving i IHERMANL. KUTTER.

